Lock



Dec. 29, 1936. w. R. SCHLAGE LOCK Filed Jan. 9, 1935 INVENTOR. 70562 0975. 2 BY @mmwegau ATTORN S.

Patented Dec. 29, 1936 UNITED STATES attain PATET i Q Fix to Schlage Lock Company,

San Francisco,

Calif., a corporation of California Application January 9, 1935, Serial No. 9'78 Claims.

This invention relates to locks of the sliding bolt type and particularly to a lock of this type which is intended for installation in hollow metal doors and like structures.

' The object of the present invention is to generally improve and simplify the construction and operation of locks of the character described; to provide a lock of the type referred to which may be installed in a hollow metal door and secured therein without the use of screws, bolts, rivets or similar fastening means; to provide a lock in which the metal forming the stile of the door functions as a housing, a support and a guide for the locking mechanism; to provide a lock in which the entire locking mechanism is housed in, and carried by, a latch bolt and as such forming a single unit for insertion or removal from a door; to provide a lock in which the latch bolt is automatically dogged or deadlocked both in the retracted and in the extended position, and in which the deadlocking mechanism is manually releasable by a knob employed for the purpose of projecting or retracting the latch bolt; and further toprovide a lock which is exceedingly simple, strong and compact in construction and which is insertable during installation through an opening formed in the outer edge of the stile and which is secured against removal when installed by the application of a knob.

The lock mechanism is shown, by way of illustration, in the accompanying drawing, in Which- Fig. 1 is a horizontal section of the lock, taken on the line I-I of Fig. 3, said view showing the latch bolt in projected and deadlocked position.

Fig. 2 is a similar section showing the latch bolt retracted and in deadlocked position.

Fig. 3 is a side view of a portion of a stile of a hollow metal door, said view showing the lock mechanism installed.

Fig. 4 is an end view of Fig. 3.

Fig. 5 is a perspective View of the latch bolt.

Fig. 6 is a perspective view of the filler plate mounted within the latch bolt.

Fig. '7 is a perspective view of the dogging member whereby the latch bolt is dogged or deadlocked both in the extended and in the retracted position.

50 Referring to the drawing in detail and particularly Figs. 1 to 4, A and B represent the opposite faces of the stile forming a hollow metal door. Formed in the outer edge of the door, indicated at C, is an opening D, through which the lock 55 mechanism is inserted; and formed in the inner face of the door is a slot E, in which is slidably mounted an actuating knob F.

The latch bolt proper is best shown in Figs. 1, 2, and 5. It consists of a single piece of metal bent upon itself to form an outer end section 2, 5 a pair of side sections 3 and i, and an inner end section 5. Secured between the side sections 3 and i of the latch bolt is a filler plate 6, this being secured by riveting, Welding or in any other suitable manner. The latch bolt thus 10 constructed forms a laminated structure, and by forming the filler piece of casehardened steel or any other especially hard metal drilling through the side of the door for the purpose of tampering with the lock is avoided. The 15 filler piece is cut away, as indicated at l, to form'a space 8 between the side walls 3 and 4 of the latch bolt, in which space is mounted a dogging member, generally indicated at ii. The dogging member is slotted at one end, as indicated at 10, and it is carried by a pin H, about which it pivots and upon which it is movable inwardly and outwardly, as will hereinafter be described.

Formed on the outer! face of the dogging member is a pair of dogging shoulders l2 and i3. One shoulder or the other will project through the slot E when the latch bolt is projected or retracted. When the latch bolt is projected, shoulder l2 will project through the slot and dog or deadlock the latch bolt in projected position; and when the latch bolt is retracted, as shown in Fig. 2, shoulder 53 will engage the opposite end of the slot and dog or deadlock the latch bolt in retracted position. A spring M is interposed between the filler piece and the dogging member 9, and it is due to the action of the spring that the shoulders i2 and [3 are projected, this action being automaticduring movement of the latch bolt, or vice versa.

The dogging member 8 serves two main func- 40 tions:

First, that of dogging or deadlocking the latch bolt in projected and also retracted position; and

Second, that of imparting movement to retract or project the latch bolt, this being accomplished by providing a projecting pin it which extends through the slot E and which is provided with a knob is, said knob being screwed or otherwise secured to the pin, as indicated.

In actual operation if the latch bolt assumes the retracted position, as shown in Fig. 2, and it is desired to project the same, it is only necessary to grasp the knob H5 and to exert pressure thereon in the direction of arrow a. Such pressure forces the shoulder l3 inwardly to clear the end of the slot E and further movement causes projection of the latch bolt; and when the latch bolt is fully projected and the knob l 6 released, spring l4 automatically projects the shoulder l2, thus deadlocking the latch bolt in projected position. If the latch bolt is projected-and it is desired to retract it, the operation is reversed. That is, pressure is exerted on the knob IS in the direction of arrow b (see Fig. 1). Such pressure will first cause the shoulder l2 to recede, or, in other words, disengage the inner end of the slot E, and further pressure will obviously cause retraction of the latch bolt. When it is fully retracted and the knob is released the spring will again automatically project the shoulder l3 and thus deadlock the latch bolt in retracted position.

Hollow metal doors as manufactured today are made in standard sizes and are formed from sheet metal and like material. The sizes usually run from one inch up to two inches in thickness, and as the latch bolt lies transversely between the inner faces of the metal sections A and B, forming the opposite faces of the stile of the door, latch bolts of varying widths will obviously be provided. During the manufacture of the door it is only necessary to punch two openings-the opening D and the slot E. The door thus completed is sent to the market and after the doors are installed the lock mechanism here disclosed can be applied.

The locking mechanism here illustrated consists of a single unit, to-wit, the latch bolt. This latch bolt houses and carries the deadlocking member 9 and the spring I4 and it also carries the pin l5 and the knob I6 secured thereto. When it is desired to install the lock mechanism it is only necessary to remove the knob l6 and to depress the pin l5 and the dogging member 9 until it assumes the dotted line position, shown at 9 in Fig. 1. In this position the latch bolt may be inserted through the opening D, formed in the edge of the door, and when the pin I5 aligns with the slot E it will be automatically projected, as shown in Figs. 1 and 2, by means of the spring I 4 and the knob Hi can then be applied. This completes the installation.

The opening D in the edge of the door forms a guide and support for one end of the latch bolt while the pin i5 and the slot E forms a guide and support for the opposite end of the latch bolt, the latch bolt being further guided by the inner faces of the metal sections A and B forming the stile of the door. Plainly speaking, it may be said that the support of the door forms the housing for locking mechanism and the latch bolt forms a housing for the. looking or dogging mechanism.

The structure as a whole is exceedingly simple, compact, and rigid in construction; it is cheap to manufacture and install; and as the latch bolt is deadlocked both in the retracted and projected position tampering with the mechanism is unlikely. Such tampering is further prevented by laminating the latch bolt and inserting the hardened filler piece 6 therein.

While certain features of the present invention are more or less specifically described, I wish it understood that various changes may be resorted to within the scope of the appended claims; and similarly that the materials and finish of the several parts employed may be such as the manufacturer may decide, or varying conditions or uses may demand.

Having thus described my invention, what I claim is:

1. In a door lock structure of the character described, a latch bolt insertable through an opening formed in the edge of a door, a dogging member housed within the latch bolt and pivotally mounted therein, a pin carried by the dogging member and projecting through a slot formed in one face of the door, a pair of dogging shoulders formed on the dogging member, one on each side of the pin, a knob on the pin, and a spring engageable with the dogging member to project one or the other of the dogging shoulders into engagement with one end or the other of the slot to deadlock the latch bolt in retracted or projected position.

2. The combination with a stile of a hollow metal door, said stile having an opening formed in the outer edge and a slot-shaped opening in one face, of a latch bolt insertable through the opening in the edge of the stile, said bolt being supported at its outer end in said opening and said bolt being so wide as to be guided by the inner faces of the stile, and means connected with the bolt and projecting through the slot in the face of the stile to support and guide the inner end of the bolt and a knob on said projecting means whereby the bolt is projected or retracted.

3. The combination with a stile, of a hollow metal door, said stile having an opening formed in the outer edge and a slot shaped opening in one face, of a latch bolt insertable through the opening in the edge of the stile, said latch bolt being hollow, a plate mounted within the hollow bolt and pivotally attached at one end to the bolt, a pair of dogging shoulders on one edge of the plate, a spring carried by the bolt and engageable with the plate for projecting one or the other of the shoulders through the slot formed in the face of the stile, and a knob connected with the plate and projecting through the slot, said knob adapted to be manually actuated to disengage either shoulder from the slot and to retract or project the bolt.

4. In a lock of the character described a reciprocating bolt unit comprising a bolt and retractor means resiliently mounted within said bolt and normally projected from one side thereof, said retractor means being depressible to a flush position within the bolt so as to permit insertion into a door opening substantially the size of the bolt.

5. The combination with the stile of a hollow metal door, said stile having an opening formed in the outer edge and an opening in one face thereof, of a latch bolt'insertable through the opening in the edge of the stile, said latch bolt being hollow and retractor means resiliently mounted within said bolt and normally projecting from one side thereof, said retractor means being depressible to a flush position within the bolt so as to permit insertion into the door through the opening in the edge thereof, said opening being substantially the size of the bolt.

WALTER R. SCHLAGE. 

